Syringe



C. E. JUHL Nov. 10, 1931.

SYRINGE Filed April 28, 1928 a EJ |NVENTOR ATTORNEY Patented Nov. 10, 1931 UNITED STATES.

amass cums E. JUHL, or .QSAGE, Iowa SYRINGE Application filed April 28,

This invention relates, to hypodermic syringes especially designed for the treatment of animals, an object being to provide a syringe which will be useful in vaccinating '6 hogs.

To this end, the invention provides a novel valve construction, whereby the serum may be drawn into the barrel of the syringe from a suitable container while communication is cut ofi from the dischar e passage. Conversely, communication may be established with the discharge passage and cut off from the container during the expelling operation.

, In vaccinating hogs, the usual dose is from sixty to one hundred cubic centimeters, and

for pigs, from forty to sixty cubic centimeters. The serum is drawn from a container of approximately five hundred cubic centimeters. The hypodermic needle is in- 20 serted beneath the skin of the animal in from two to four places and the serum is alternately drawin from the container and is shot beneath the skin. In automatic ball valve syringes, the valves sometimes fail to seat due to sediment, and from other causes,

and some of the serum goes back into the container instead of beneath the skin of the animah'so that an accurate dose is not used. The present invention provides means for positively closing either the intake or discharge passage of the syringe and thus overcomes this disadvantage.

Another obj ect of the invention is the provision of a valve of the above type which may be manufactured and sold separately and applied to a syringe, or may form a part of the syringe.

With the above and other objects in View, the invention further includes thefollowing novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

In the drawings c Figure 1 is a view illustrating the use of the invention.

Figure 2 is an enlarged fragmentary sectional View taken through the valve and the adjacent part of the barrel of the syringe, the

1928. "Serial No. eraser vala e bing sage. a

Figure :13 is asimilanview but showing the valve-arranged to open the discharge past I r Figures 4 and P5 are sectional views taken respectively on the lines 4-4 and 5-5 of *Ii igIIIQE Q. i

arranged' to open the inlet pas- *Referringfto the drawings indetail where- :in like characters er reference denote corresponding parts, "the 'rreference character indioatesfthe barrel of the syringe which is of the usual type and is provided with the usual lunger "1l1, gnad'uated stem '12and stop nut 71 iOne'aend of thebar-re'l is :provided witha plug 14 having a threaded opening 15 and this opening removably receives the re duced ithreadedeextension "16 of a chuck 17 which carriesea hypodermic needle 18.

" The-:preseiitlinvention is in the form of an attachment for the syringe and the chuck is removedoiromthe p1ug14 and is replaced lloya lreduced ithreaded extension 19 whidhextends from:.one endofaneck 1'9,th e

threaded eextensi'on 19":of:th=is neck andthe thiieadedextension 16 0f the chuck '17 being adapted for rremovable connection with the plug 14.

Theeouter-rend .ozfxthe neck 19-istapered and is ireceiwted within :a' tapered socket 20 proviided in one end of a'valve member 21. The

neck "19 is iprovided' with aflange 22 and this flange "is engaged by a nut 23 which threadedly engages-the rotatable member 21 so that thed atter is swiveled upon the-nec'klS).

EXt-ending through the nec'k'is a longituf din'allv and "laterally extending nassaae .24 which is ada ted to communicate with an. inlet pa'ssage'25 {provided in the valve member 21'. A nipple 26 extends from the passage andfa flexible tube 27%has one of itsiends secured to the nipple while secured to :the opposite end of this tube is a canula 28.. The latter viisaadapted .to be inserted within a ,serum acontainer 29.

The valve memher 21 is provided with a discharge passage 30 which isalso adapted to commmiioate with .the ,passage 24 of the neck .19 so ,as to provide communication between this passage 24: and the passage 31 of the chuck.

In the use of the invention, the canula is inserted within the serum container and the valve positioned so as to provide communication between the inlet passage 25 and the interior of the barrel. The plunger is operated to draw the serum into the barrel, after which the valve is rotated so that the passage 24 communicates with the discharge passage 30. The passage 25 will thus be positively cut off from thepassage 24 while the serum mav be expelled through the needle 18.

The rotatable member 21 is provided with a stop pin 32 which extends from its upper end and is adapted to engage opposite shoulders 33 provided at opposite ends of a cut out portion of the flange 22. By rotating the member 21 the limit permitted between the shoulders 33. the passages 25 and 30 will be properly positioned with respect'to the passage 24:. a

Due to the construction of the valve, no sediment of any character can lodge therein to interfere with its eflic ent operation or to cause back firing or discharge of some of the serum from the syringe barrel back into the con ainer 29. l

By adjusting the nut 23, wear may be taken u between the rotatable member and neck 19.

The invention may be manufactured and sold separately from the syringe. it being only necessary to remove the lug 17 and insert the neck 19 with the chuck attached at the outer end of the rotatable member 21.

The invention is susceptible of various chan es in its form. proportions and minor details of construction and the right is herein reserved to make such changes as pro erly fal within the scope of the appended claim;

Having described the invention what is claimed is:

In a hypodermic syringe of the usual type including a barrel, a plug having a threaded opening and secured in said barrel, a chuck carrving a hypodermic needleand provided with a passage extending through the needle. a threaded extension on said chuck and adapted to be received in the threaded o ening, an-attachment for said syringe and being adapted to be disposed between the barrel and chuck and including a neck portion having means adapted to be received in the threaded opening, a tapered portion formed w th said neck and together with said neck being provided with a passage in communication with said barrel, a rotatable member provided with a tapered socket at one end to receive the tapered portion and a threaded opening at its opposite end to receive the threaded extension of the chuck. saidrotatable member being provided with a laterallyextending passage and an inclined passage, the latter terminating in the threaded opening of the rotatable member for communication with the passage in the chuck, 

